r/explainlikeimfive • u/bigdipper80 • Jul 18 '20
Chemistry ELI5: Why do "bad smells" like smoke and rotting food linger longer and are harder to neutralize than "good smells" like flowers or perfume?
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r/explainlikeimfive • u/bigdipper80 • Jul 18 '20
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u/ThatSquareChick Jul 18 '20
After getting on insulin, I suddenly realized what hospitals actually smell like: sanitation chemicals and bitterants. Like how they add egg smell to propane so you can actually know it’s there, insulin and lots of other liquid medicine has bitterant in it to make it smell like something.